22564729 has 16 divisors (see below), whose sum is σ = 26467776. Its totient is φ = 19008000.

The previous prime is 22564699. The next prime is 22564741. The reversal of 22564729 is 92746522.

It is a happy number.

It is not a de Polignac number, because 22564729 - 2¹⁹ = 22040441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22564769) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11629 + ... + 13429.

It is an arithmetic number, because the mean of its divisors is an integer number (1654236).

Almost surely, 2^22564729 is an apocalyptic number.

It is an amenable number.

22564729 is a deficient number, since it is larger than the sum of its proper divisors (3903047).

22564729 is a wasteful number, since it uses less digits than its factorization.

22564729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1896.

The product of its digits is 60480, while the sum is 37.

The square root of 22564729 is about 4750.2346257843. The cubic root of 22564729 is about 282.5812708978.

The spelling of 22564729 in words is "twenty-two million, five hundred sixty-four thousand, seven hundred twenty-nine".